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J. KIMS Technol > Volume 21(3); 2018 > Article
Journal of the Korea Institute of Military Science and Technology 2018;21(3):288-294.
DOI: https://doi.org/10.9766/KIMST.2018.21.3.288   
Experimental Study on Acoustic Absorption and Transmission Characteristics of Aluminium and Sandwich Composite Structure
Yoon-kyu Lee, Dae-oen Lee, Byung-Dae Jin, Dong-min Lee
The 1st Research and Development Institute, Agency for Defense Development
금속 및 샌드위치 복합재 유도탄 구조체의 흡음 및 차음 특성에 관한 실험적 연구
이윤규, 이대은, 진병대, 이동민
국방과학연구소 제1기술연구본부
Abstract
Recently, as the speed and performance of the launcher and the missile have been improved, it is necessary to consider the acoustic load of launching and flight in initial design step. In this paper, an experimental study on acoustic absorption and transmission characteristics of aluminium vs. sandwich composite structures were conducted. The overall noise reduction was evaluated by performing an acoustic test in the reverberation room, and the acoustic absorption and transmission loss of the structures were analyzed by conducting the sound absorption test inside the structure.
Key Words: Noise Reduction, Acoustic Absorption, Acoustic Transmission Loss


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